﻿using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication2
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        SqlHelper sqlHelper = new SqlHelper();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindGV();
            }
        }

        private void BindGV()
        {
            string sql = "select * from StudentInfo";
            GridView1.DataSource = sqlHelper.Get(sql, null);
            GridView1.DataKeyNames = new string[] { "stu_id" };
            GridView1.DataBind();
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string name = TextBox1.Text;
            string sql = "select * from StudentInfo where stu_name like '%'+@name+'%'";
            SqlParameter[] pars =
            {
                new SqlParameter("@name",name)
            };
            GridView1.DataSource = sqlHelper.Get(sql, pars);
            GridView1.DataBind();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            string name = TextBox2.Text;
            string pwd = TextBox3.Text;
            string email = TextBox4.Text;
            string intro = TextBox5.Text;

            string sql = "insert into StudentInfo(stu_name,email,intro,password) values (@name,@email,@intro,@pwd)";

            SqlParameter[] pars =
            {
                new SqlParameter("@name",name),
                new SqlParameter("email",email),
                new SqlParameter("@intro",intro),
                new SqlParameter("@pwd",pwd)
            };
            if (sqlHelper.Execute(sql, pars))
            {
                BindGV();
            }
            else
            {
                Response.Write("注册失败！");
            }


        }

        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            string id = GridView1.DataKeys[e.RowIndex].Value.ToString();
            string sql = "delete from StudentInfo where stu_id=@id";
            SqlParameter[] pars =
            {
                new SqlParameter("@id",id),
            };
            if (sqlHelper.Execute(sql, pars))
            {
                BindGV();
            }
            Response.Write($"{id}");
        }

        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            BindGV();
        }

        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            GridView1.EditIndex = -1;
            BindGV();
        }

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            string id = GridView1.DataKeys[e.RowIndex].Value.ToString();
            string name = (GridView1.Rows[e.RowIndex].Cells[0].Controls[0] as TextBox).Text;
            string pwd = (GridView1.Rows[e.RowIndex].Cells[1].Controls[0] as TextBox).Text;
            string email = (GridView1.Rows[e.RowIndex].Cells[2].Controls[0] as TextBox).Text;
            string intro = (GridView1.Rows[e.RowIndex].Cells[3].Controls[0] as TextBox).Text;

            string sql = "update StudentInfo set stu_name=@name,email=@email,intro=@intro,password=@pwd where stu_id=@id";
            SqlParameter[] pars =
            {
                new SqlParameter("@name",name),
                new SqlParameter("@email",email),
                new SqlParameter("@intro",intro),
                new SqlParameter("@pwd",pwd),
                new SqlParameter("@id",id)

            };
            if (sqlHelper.Execute(sql, pars))
            {
                BindGV();
            }

        }
    }
}